Nkarta to Present Initial Autoimmune Clinical Data for NKX019 at American College of Rheumatology (ACR) Convergence 2026
Nkarta will share first safety and activity overview for NKX019 in multiple autoimmune diseases through three presentations at ACR Convergence 2026.
Rhea-AI Summary
Nkarta (NKTX) will present initial autoimmune clinical data for its investigational CAR-NK therapy NKX019 at ACR Convergence 2026 in Orlando.
Three presentations were accepted: two oral talks on NKX019’s safety across autoimmune indications in the Ntrust Phase 1/2 studies and its clinical activity in idiopathic inflammatory myopathy, and a poster on preliminary safety, PK/PD and clinical activity in systemic sclerosis. The meeting runs November 6‑11, 2026.
The idiopathic inflammatory myopathy oral presentation (Abstract #0903) is scheduled for Sunday, November 8, 1:15–1:30 pm ET. A second oral talk on immune‑mediated and hematologic safety outcomes following lymphodepletion and NKX019 in B‑cell–mediated autoimmune diseases (Abstract #2938) is set for Wednesday, November 11, 10:15–10:30 am ET. The systemic sclerosis poster (Abstract #1179) will be presented Monday, November 9, 10:30 am–12:30 pm ET.
The Ntrust-1 and Ntrust-2 basket trials are multicenter, open‑label, dose‑escalation studies enrolling up to 12 patients per dose level per indication across several B‑cell–driven autoimmune diseases, evaluating NKX019 after fludarabine/cyclophosphamide or cyclophosphamide-only lymphodepletion. Presentation materials are expected to be posted on Nkarta’s website following the event.
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Key Figures
- Scientific presentations
- 3 presentations
- ACR Convergence 2026
- Oral presentations
- 2 oral presentations
- NKX019 autoimmune clinical data
- Poster presentations
- 1 poster presentation
- NKX019 systemic sclerosis clinical activity
Key Terms
car-nk cell therapy medical
allogeneic medical
pk/pd medical
lymphodepletion medical
dose-escalation medical
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- Two abstracts selected for oral presentations, highlighting investigational CAR-NK cell therapy’s clinical activity in idiopathic inflammatory myopathy and overall safety profile
- Third abstract selected for poster presentation highlighting NKX019’s clinical activity in systemic sclerosis
SOUTH SAN FRANCISCO, Calif., Sept. 08, 2026 (GLOBE NEWSWIRE) -- Nkarta, Inc. (Nasdaq: NKTX), a clinical-stage biotechnology company developing engineered natural killer (NK) cell therapies to treat autoimmune diseases, today announced its selection for three scientific presentations at ACR Convergence 2026 being held November 6-11 in Orlando.
Nkarta was chosen to give two oral presentations, highlighting the safety of NKX019 across all autoimmune indications in the Ntrust Phase 1/2 studies and its clinical activity in idiopathic inflammatory myopathy, as well as a poster presentation on clinical activity in systemic sclerosis.
"These three presentations represent an important milestone for Nkarta as we share our first overview of NKX019's safety profile and clinical activity in patients with devastating autoimmune conditions," said Nkarta CEO Paul J. Hastings. “The tolerability of NKX019 and early efficacy we’re seeing in our leading indications, myositis and scleroderma, combined with its off-the-shelf availability and ability to be dosed on an outpatient basis, hold the potential to dramatically expand patient access to cell therapy. We look forward to presenting our clinical findings to the rheumatology community and their patients.”
Details of the presentations are as follows:
Title: Preliminary Safety, PK/PD, and Clinical Activity of NKX019, an Allogeneic, CD19-Targeted, CAR NK-Cell Therapy, in Idiopathic Inflammatory Myopathy: Results From an Ongoing, Phase 1/2, Open-Label, Multicenter, Dose-Escalation/Optimization, Basket Study
Presentation type: Oral
Session: Muscle Biology, Myositis, & Myopathies - Clinical: Novel and Emerging Therapies in Myositis (0902-0907)
Date and Time: Sunday, November 8th, 1:15pm-1:30 pm ET
Presenting Author: Guillermo J. Valenzuela, MD, FACR, President and Principal Investigator, Integral Rheumatology and Immunology Specialists
Abstract #: 0903
Title: Overall, Immune-Mediated, and Hematologic Safety Outcomes Following Fludarabine/Cyclophosphamide Lymphodepletion and NKX019, an Allogeneic CD19-Targeted CAR NK-Cell Therapy, in B-Cell-Mediated Autoimmune Diseases
Presentation type: Oral
Session: Miscellaneous Rheumatic & Inflammatory Diseases: Focus on Hematologic Mechanisms and Disease (2935-2940)
Date and Time: Wednesday, November 11th, 10:15am -10:30am ET
Presenting Author: Guillermo J. Valenzuela, MD, FACR, President and Principal Investigator, Integral Rheumatology and Immunology Specialists
Abstract #: 2938
Title: Preliminary Safety, PK/PD, and Clinical Activity of NKX019, an Allogeneic, CD19-Targeted, CAR NK-Cell Therapy, in Systemic Sclerosis: Results From an Ongoing, Phase 1/2, Open-Label, Multicenter, Dose-Escalation/Optimization, Basket Study
Presentation type: Poster
Session: (1172-1182) Systemic Sclerosis & Related Disorders - Treatment Poster B
Date and Time: Monday, November 9th, 10:30am-12:30pm ET
Presenting Author: Dinesh Khanna, MBBS, MSc, Frederick G.L. Huetwell Professor of Rheumatology and Director, University of Michigan Scleroderma Program
Abstract #: 1179
Additional information, including the accepted abstracts, can be accessed on the ACR Convergence 2026 website. Presentation materials will be made available on the Publications section of Nkarta's website at www.nkartatx.com following the event.
About the Ntrust℠ Clinical Trials in Autoimmune Disease
Ntrust-1 (NCT06557265) and Ntrust-2 (NCT06733935) are multi-center, open label, dose escalation clinical trials in patients with autoimmune disease receiving lymphodepletion followed by CD19-targeted CAR-NK cell therapy. Both trials assess the safety of NKX019 in people living with autoimmune diseases as well as its potential to achieve durable remission via a “reset” of the immune system through the elimination of pathogenic B cells.
The Ntrust trials are enrolling up to 12 patients per dose level per disease indication across systemic sclerosis, idiopathic inflammatory myopathy, ANCA-associated vasculitis, rheumatoid arthritis, lupus nephritis, and primary membranous nephropathy. Additional participants may be enrolled if needed to refine patient populations for further study.
In both studies, patients receive a three-dose cycle of NKX019 following lymphodepletion with fludarabine and cyclophosphamide or cyclophosphamide alone, if they have significant cytopenia at baseline. This approach is designed to evaluate the single-agent activity of NKX019 and facilitate a more rapid path to regulatory approval. Patients in both trials may also receive additional cycles, if needed, to restore response or enable a deeper response.
About NKX019
NKX019 is an allogeneic, cryopreserved, off-the-shelf immunotherapy candidate that uses natural killer (NK) cells derived from the peripheral blood of healthy adult donors. It is engineered with a humanized CD19-directed chimeric antigen receptor (CAR) for enhanced cell targeting and a proprietary, membrane-bound form of interleukin-15 (IL-15) for greater persistence and activity without exogenous cytokine support. CD19 is a biomarker for normal B cells as well as those implicated in autoimmune disease. Nkarta is evaluating NKX019 in multiple autoimmune conditions.
About Nkarta
Nkarta is a clinical-stage biotechnology company advancing the development of allogeneic, off-the-shelf natural killer (NK) cell therapies for people living with autoimmune diseases. By harnessing the power of the innate immune system to eliminate pathogenic B cells driving the autoimmune response, Nkarta is advancing novel cell therapies engineered for deep therapeutic impact. The on-demand availability and outpatient dosing of our CAR-NK cells enables a broad population of patients with different autoimmune conditions to conveniently access NK cell therapy in community health settings. For more information, please visit the company’s website at www.nkartatx.com.
Cautionary Note on Forward-Looking Statements
Statements contained in this press release regarding matters that are not historical facts are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995, as amended. Words such as “anticipates,” “believes,” “expects,” “intends,” “plans,” “potential,” “projects,” “would” and “future” or similar expressions are intended to identify forward-looking statements. Examples of these forward-looking statements include, but are not limited to, statements concerning Nkarta’s expectations regarding any or all of the following: Nkarta’s position, plans, strategies, and timelines for the continued and future clinical development and potential of NKX019 (including the future availability and disclosure of clinical data and other updates from Nkarta’s clinical trials); the therapeutic potential, accessibility and tolerability of NKX019 for the treatment of autoimmune diseases, including as a result of advancing Nkarta’s dose escalation and expansion of outpatient dosing in community-based settings; and the potential for NKX019 to address significant unmet medical need in B-cell-mediated autoimmune diseases.
Because such statements are subject to risks and uncertainties, actual results may differ materially from those expressed or implied by such forward-looking statements. These risks and uncertainties include, among others: Nkarta’s limited operating history and historical losses; Nkarta’s lack of any products approved for sale and its ability to achieve profitability; the risk that the results of preclinical studies and early-stage clinical trials may not be predictive of future results; Nkarta’s ability to raise additional funding to complete the development and any commercialization of its product candidates; Nkarta’s dependence on the clinical success of NKX019; that Nkarta may be delayed in initiating, enrolling patients in or completing its clinical trials; competition from third parties that are developing products for similar uses; Nkarta’s ability to obtain, maintain and protect its intellectual property; Nkarta’s dependence on third parties in connection with manufacturing, clinical trials and pre-clinical studies; and the complexity of the manufacturing process for CAR NK cell therapies.
These and other risks and uncertainties are described more fully in Nkarta’s filings with the Securities and Exchange Commission (“SEC”), including the “Risk Factors” section of Nkarta’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2026, filed with the SEC on August 10, 2026 and Nkarta’s other documents subsequently filed with or furnished to the SEC. All forward-looking statements contained in this press release speak only as of the date on which they were made. Except to the extent required by law, Nkarta undertakes no obligation to update such statements to reflect events that occur or circumstances that exist after the date on which they were made.
Nkarta Media/Investor Contact:
Nadir Mahmood
Nkarta, Inc.
nmahmood@nkartatx.com
FAQ
What types of NKX019 presentations were accepted at ACR Convergence 2026?
Nkarta will deliver two oral presentations and one poster. The oral talks cover overall, immune‑mediated and hematologic safety after lymphodepletion plus NKX019 in B‑cell–mediated autoimmune diseases, and preliminary safety, PK/PD and clinical activity in idiopathic inflammatory myopathy. The poster focuses on preliminary safety, PK/PD and clinical activity of NKX019 in systemic sclerosis.
When and where are the NKX019 sessions scheduled during ACR Convergence 2026?
The idiopathic inflammatory myopathy oral session is on Sunday, November 8, from 1:15–1:30 pm ET in the Muscle Biology, Myositis, & Myopathies – Clinical: Novel and Emerging Therapies in Myositis session (Abstract #0903). The safety outcomes oral presentation is on Wednesday, November 11, from 10:15–10:30 am ET in the Miscellaneous Rheumatic & Inflammatory Diseases: Focus on Hematologic Mechanisms and Disease session (Abstract #2938). The systemic sclerosis poster (Abstract #1179) will be presented on Monday, November 9, from 10:30 am–12:30 pm ET in the Systemic Sclerosis & Related Disorders – Treatment Poster B session.
Which autoimmune diseases are included in the Ntrust clinical trials of NKX019?
The Ntrust-1 and Ntrust-2 trials enroll patients with several autoimmune diseases, including systemic sclerosis, idiopathic inflammatory myopathy, ANCA-associated vasculitis, rheumatoid arthritis, lupus nephritis, and primary membranous nephropathy.
How are the Ntrust-1 and Ntrust-2 trials designed and what treatment do patients receive?
Ntrust-1 (NCT06557265) and Ntrust-2 (NCT06733935) are multicenter, open-label, dose-escalation trials in autoimmune disease. Patients receive lymphodepletion with fludarabine and cyclophosphamide or cyclophosphamide alone if they have significant baseline cytopenia, followed by a three-dose cycle of NKX019. Additional NKX019 cycles may be given to restore or deepen response. The trials assess the safety of NKX019 and its potential to induce durable remission by eliminating pathogenic B cells.
Where can investors and clinicians access the NKX019 ACR abstracts and presentation materials?
The accepted abstracts can be accessed on the ACR Convergence 2026 website. Nkarta plans to make presentation materials available after the conference on the Publications section of its website at www.nkartatx.com.
What is NKX019 and how is it engineered for autoimmune disease treatment?
NKX019 is an allogeneic, cryopreserved, off-the-shelf immunotherapy candidate made from NK cells derived from healthy adult donor peripheral blood. It is engineered with a humanized CD19-directed CAR to target B cells and a membrane-bound form of interleukin-15 (IL-15) intended to enhance persistence and activity without the need for exogenous cytokine support. CD19 is a biomarker on normal and pathogenic B cells implicated in autoimmune disease, and NKX019 is being evaluated in multiple autoimmune indications.